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DOI10.1007/s00382-018-4373-2
On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking
Messori, Gabriele1,2; Davini, Paolo4,5; Alvarez-Castro, M. Carmen3,6; Pausata, Francesco S. R.1,2,7; Yiou, Pascal3; Caballero, Rodrigo1,2
发表日期2019
ISSN0930-7575
EISSN1432-0894
卷号52期号:3-4页码:2431-2450
英文摘要

Planetary wave-breaking can lead to large-scale atmospheric circulation anomalies and favour high-impact weather occurrences. For example, the simultaneous occurrence of anti-cyclonic wave-breaking to the south of the North Atlantic jet and cyclonic wave-breaking to the north, here termed double wave-breaking, has been linked to heightened frequencies of explosive cyclones in the Atlantic basin and destructive windstorms over Western and Continental Europe. The present study analyses the long-term temporal variability of wintertime cyclonic and anti-cyclonic wave-breaking, and the resulting double wave-breaking, in the North Atlantic. We use reanalysis data, proxy reconstructions of the North Atlantic Oscillation (NAO) and a 1000-year coupled global climate model equilibrium simulation under constant pre-industrial forcing. The wave-breaking wavelet spectra highlight a significant ultra-centennial variability in double wave-breaking frequency, which is largely mirrored in the variability of the NAO. However, we note that the NAO wavelet spectra in the different datasets display significant discrepancies. The low-frequency wave-breaking variability is reflected in long-term anomalies of the large-scale atmospheric circulation in the Euro-Atlantic sector. The 100-year periods with the most and least double wave-breaking occurrences display significant and opposite anomalies in both upper and lower-level wind, as well as in the frequency of extreme temperature events and in the magnitude of wind destructiveness over Europe. The latter broadly resembles the wind destructiveness anomalies associated with individual double wave-breaking instances in reanalysis data. The existence of low-frequency variability in an atmospheric pattern related to high-impact weather events has important implications for the study and interpretation of climate change projections and of possible future NAO changes.


WOS研究方向Meteorology & Atmospheric Sciences
来源期刊CLIMATE DYNAMICS
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/90306
作者单位1.Stockholm Univ, Dept Meteorol, Stockholm, Sweden;
2.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden;
3.Univ Paris Saclay, Lab Sci Climat & Environm, CNRS, CEA,UVSQ,IPSL,UMR 8212, F-91191 Gif Sur Yvette, France;
4.PSL Res Univ, CNRS, Ecole Normale Super, Lab Meteorol Dynam,IPSL, Paris, France;
5.CNR, ISAC, Turin, Italy;
6.CMCC Fdn, Ctr euroMediterraneo Cambiamenti Climat, Bologna, Italy;
7.Univ Quebec Montreal, Dept Sci Terre & Atmosphere, Montreal, PQ, Canada
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Messori, Gabriele,Davini, Paolo,Alvarez-Castro, M. Carmen,et al. On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking[J],2019,52(3-4):2431-2450.
APA Messori, Gabriele,Davini, Paolo,Alvarez-Castro, M. Carmen,Pausata, Francesco S. R.,Yiou, Pascal,&Caballero, Rodrigo.(2019).On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking.CLIMATE DYNAMICS,52(3-4),2431-2450.
MLA Messori, Gabriele,et al."On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking".CLIMATE DYNAMICS 52.3-4(2019):2431-2450.
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